2 hollow core doors (mine were from Home Depot for $25 each that are the same width as your chosen bookcases) 4 shelving units (mine were from WalMart for $16 each, here is the link: http://www.walmart.com/ip/Mainstays-3-Shelf-Bookcase-White/17480392) Primer and paint of your choice Polyacrylic 4 large L-brackets and matching screws